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This type of test is typically performed on a garment, undergarment or other item (pantiliner, etc.) when a person suspects another of infidelity or other sexual activity. 

The results indicate whether the item is positive or negative for the presence of semen.  This type of test is NOT a DNA test.  It determines whether there is a presence of semen on a garment or item.  It does not determine whether DNA is present, if there is enough DNA, or if there is usable DNA. 

If the garment or item test positive for the presence of semen, the next step to pursue is a DNA DETECTION TEST.

The testing method utilized in our Semen Detection Test is Prostate Specific Antigen (PSA), which is a confirmatory test.  The detection of PSA on forensic samples is often helpful since it will confirm the presence of semen even in samples involving vasectomized or azospermic individuals.  (Other methods often utilized are Microscopic Inspection which looks for sperm, not semen; and Acid Phosphatase (AP) which is a presumptive test and can test positive for substances other than semen.)

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